Method of operating eeed-nots in lathes



W. y A. PATRICK.

Turning Lathe.

Patented Feb. 14, 1860.

Inventor:

-Wtnessem anism for the intended purpose, one that U NITEI) STATESPATENT OFFICE.

METHOD OF `OPERA'I]'.I\TGr FEED-NUTS IN LA'IHES.`

Specification of Letters Patent No. 27,149, dated February 14, 1860.

are fitted. The shape of the slots cl, d, is shown clearly in Fig. 2.

Between the plate B, and the plates b, b, there is placed a yoke C, towhich the pins e, e, are attached. This yoke works on a screw guide D,which is a short tube fitted in the plate B, and one end of the yoke isconnected by a rod f, to a hand lever E, the fulcrum g, of which passesthrough the upper end of an upright It, on the carriage A. The oppositeend of the yoke C, has a spring F, attached to it, which spring has atendency to keep the two sections c, c, of the nut separated or in anopen state.

To the upper surface of the carriage A, an upright G, is attached. Thisupright has a vertical spring I-I, secured to one side of it, saidspring being secured at its lower end to the upright by means of a screwz', which passes through an oblong slot j, in the lower part of thespring, as shown clearly in Fig. 1. At the upper part of the spring II,at one side opposite the lever E, there is a. ledge or lateralprojection j', which serves as a support for the lever E, when thelatter is raised to its fullest extent. The screw (not shown) passesthrough the guide D, between the two sections c, o, of the nut4 andthrough a guide 7e, in a plate Z, attached to the carriage. This plateZ, serves as a guard and prevents shavings and foreign substances comingin contact with the nut.

To all whom it may concern: slots pins e, e,

Be it known that I, IV. A. PATRICK, of Ludlow, `in the county of Windsorand State of Vermont, have invented a new and useful Improvement inOperating the Adjustable Nuts of the Feed Mechanism of Turning-Lathes;and I do hereby declare that the following is a full, clear, and exactdescription of the same, reference being had to the annexed drawings,making a part of this specification, in which- Figure l, is a side viewof my invention detached from a lat-he. Fig. 2, a transverse verticalsection of ditto, taken in the line ai, m, Fig. 1. Fig. 3, alongitudinal vertical section of ditto, taken in the line y, y, Fig. 2.

This invention relates to an improved means for operating or adjustingthe two parts of a divided nut, so that the same may be made to engagewith or be disengaged from the feed screw which, when the nut is engagedwith it gives the feed movement to the carriage containing the knife.

The object of the within described invention is to obtain a simple andefficientl mechmay be readily operated, not liable to be deranged orrendered inoperative by use, and one that can be retained in the twopositions necessary to keep the nut in an open and closed state, andalso due provision made for wear.

To enable those skilled in the art to fully understand and construct myinvention I will proceed to describe it.

A, represents a carriage or rest which is fitted between suitable guidesconnected with a lathe as usual. This carriage may be of usualconstruction and therefore does not require a minute description. Theknife also is attached to this carriage and arranged in the ordinaryway.

B, represents a vertical plate attached to one end of the carriage A.This plate has dovetail guides a, a, attached to its inner sides, one atits top and the other at its bottom. Between these guides a, a, twoplates b, b, are placed or fitted and allowed to slide freely. To theseplates Z), b, the sections c, c, of the nut are attached one to each.The sections c, c, are longitudinal halves and they project outward atright angles from the plates o, b. Each plate b, has a curved slot (Z,made in it into which When the carriage A, is to be operated, theattendant raises the lever E, which, through the medium of the rod f,actuates the yoke C, the latter in consequence of its pins e, "e,fitting in the curved slots d, d, of the plates b, o, shoves thesections or parts c, c, of the nut toward each other and causes the sameto fit snugly to the screw. When the nut is to be disengaged from thescrew, the spring H, is so actuated as to cause the ledge or projectionj', to be thrown out` from underneath the lever and the spring F,immediately throws upward the end ofthe yoke to whic it is attached andthereby. separates the sections 0, c, of the nut and disengages the samefrom the screw.

In case the sections c, @,of the nut become worn, or in case of thewearin of the screw, the spring H, may be adj uste vertically tocompensate forsaid wear by releasing screw z', the spring andconsequently the ledge or projection y The operation will be readilyseen being raised in proportion to 11G the Wear and thereby admitting ofa greater Z), of the sections c, 0, elevation of lever eans of vthe pinsand slotsv 10 of the nut andscre e, e, d, d, the Whole being arranged toop- Having thus described my invention What erate as and for the purposeset forth. I claim as new and desire to secure by Let- Y W. A. PATRICK.

ters Patent, is,

'The yoke C, connected With the'hand lever and spring F, and alsoconnected With the sliding plates 7and a closer adjustment of the nut byIn Witnesses J. R. Sharron), EDUARD A. ROCK.

